SEA-CURE

On the basis of 00Cr29Mo4TiNb steel, HuaNickel SEA-CURE is developed in order to improve the plasticity, toughness, weldability, thermal stability and hydrogen embrittlement resistance of the steel, reduce chromium and nickel and use Ti+Nb double stabilization. Together with the aforementioned Cr29Mo4 (Ti, Nb), SEA-CURE is also one of the most well-known super ferritic stainless steels currently used in the heat transfer tube of seawater condenser in power plants.

SEA-CUREChemical composition：

	Fe	Cr	Ni	Mo	Ti	V	B	C	AI	Si	Mn	P	S
Min	Bal	13	24.5	1	2.4	0.01	0.005			≤
Max		16	28.5	1.75	3.2	0.1	0.025	0.06	0.35	0.35	0.75	0.025	0.025

SEA-CUREPhysical properties：

Density p/g·cm~3	Linear expansion coefficienta/10-6·K-1			Thermal conductivityA/W·(m·K)-1			Specific heat capacityc/J · (kg·K)-1
	20～100℃	20～150℃	20～250 ℃	20℃	150℃	200℃
7.8	9.68	9.77	10.66	15.9	19.5	20.6	500

SEA-CUREMechanical properties：

Temperature/℃	d,z/MPa	σb/MPa	δ/%
23	517	620	25
93	455	572	24
149	392	538	23
204	365	517	21
260	345	517	21

SEA-CUREAlloy properties：

The microstructure of this steel is the same as that of all super ferritic stainless steels, and the matrix structure of this steel has a body-centered cubic ferrite structure, and when heated at medium temperature (sensitized or welded heat-affected zone), there will be intermetallic compounds such as carbon, nitride and σ on the matrix, which will adversely affect the properties of the steel.

SEA-CUREUses of alloys：

This steel is mainly used for seawater corrosion-resistant pipelines, seawater condensers, heat exchangers, etc., and the price is far cheaper than copper, copper alloys and titanium.

SEA-CUREProcess performance：

Welding process: SEA-CURE steel has good welding performance. It can be welded by common welding methods of stainless steel, such as GTAW (with or without wire filling), GMAW, SMAW, etc.

Heat treatment: SEA-CURE is suitable for heat treatment at a temperature of 950~1100°C, and it is quickly cooled after heating and heat preservation.

Relevant standards：

ASTM A268/A268M-2020